Simple.
Socialism teach one that they the society i.e the government owes them certain tangible things i.e housing or healthcare.
These are not free they cost money and they require the services of others.
In other words if you are poor and I am wealthy you basic rights are that I am obligated to give you a portion of my work and you have the right to it.
( in other words your basic rights are the ability to steal from me)
As opposed to the founding philosophy which stated that my inherent rights are God given and the government cannot infringe upon them but the government is likewise not obligated to grant you them.
In actuality a central part of the philosophy of the founding of the United states was that basic rights were “inalienable”
The government could not infringe upon them because they were GOD given, and hence if they made rules against your inalienable rights they were inherently unjust.
Flowing from that is the concept of Capitalism, that it is not my skin color or creed that decides my success it is the “capitol” that I have and as long as I invest it the way I see fit the profits or losses belong to me.
You do not have a right to my work nor do I have a claim on yours.